I'd love to see them add an evolution for Lucario in Gen VI to be honest! Lucario is an amazing Pokémon yes, and it's definitely able to hold its own in battle, but unfortunately there's so many Pokémon that outclass it or counter it so effectively that's he's becoming very difficult to use well on a team. I think the main problem comes from the huge surplus of Ground, Fire & Fighting moves in the metagame, so perhaps having an evolution which reverts back to just being Fighting type (or maybe even Psychic + Fighting would suit him well?) would be a lot more use? Or even just an ability which somehow disregards the weaknesses he gains from being a Steel type would be good enough haha. But yeah, basically I'd like to see his weaknesses reduced tenfold!